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OTHER (EXPENSE) INCOME, NET
3 Months Ended
Mar. 31, 2020
Other Income and Expenses [Abstract]  
OTHER (EXPENSE) INCOME, NET OTHER INCOME (EXPENSE), NET
The principal components of other expense, net, are as follows (in thousands):
 
 Three Months Ended March 31,
 20202019
Interest and investment income$312  $ 
Income tax expense(206) (236) 
Other non-operating income —  
Total other income (expense), net$108  $(229)